RÉSUMÉ
The objective of this study is host-parasite relationship among Loranthaceae flowering shrubs, Myrmecophytic fruit trees and ants. The study was conducted in 2009 in the garden plots and orchards of houses in the Logbessou district of Douala, Cameroon. We inventoried a total of 141 myrmecophytic fruit trees (diameter ≤ 45 cm) of which 95 (67.3%) were parasitized by flowering-shrub epiphytes (Loranthaceae). These trees belong to 14 species, 11 genera and 8 families. Among the eight species of ants inventoried on the trees, two were arboreal-dwelling and six were ground-dwelling, arboreal-foraging species. They belonged to two sub-families: the Formicinae, which were mostly represented by two genera, Camponotus and Paratrechina; and the Myrmicinae, which were more abundant (87.5%). The ants nested in the domatia of myrmecophyte hosts or hollow branches, trunks and dead suckers of Loranthaceae. Crematogaster was the most frequent genus and dominant ant on all of the parasitized host trees.